The application is called Lullaby and it is a music player that plays songs to help you sleep. The app has the option to use your phone's built-in microphone to listen to the sound of your baby's cry and it will help you to calm down.

The application has a list of the most common problems that cause babies to cry and it is possible to use the app to help you to solve those problems. It is possible to use the app to help your baby sleep, because it is very effective in calming down.

The app has a list of different songs that you can use to help you sleep. The list has different types of songs, like nursery rhymes, popular songs, classical songs, and more.

The application has a list of different music styles and you can choose the one that you like. It is possible to choose the time that you want to listen to the song and it is also possible to use the app as a regular music player.